A Study on SOx Emission Characteristics in Coal Combustion

석탄 연소시 SOx 배출 특성에 관한 연구

  • Kang, Youn Suk (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Kim, Sung Su (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Lee, Hyun Dong (Fossil Fuel Combustion Power Generation Laboratory) ;
  • Kim, Jae-Kwan (Fossil Fuel Combustion Power Generation Laboratory) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University)
  • 강연석 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 김성수 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 이현동 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 김재관 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 홍성창 (경기대학교 일반대학원 환경에너지시스템공학과)
  • Received : 2011.01.24
  • Accepted : 2011.02.24
  • Published : 2011.04.10

Abstract

The characteristics of SOx emission were investigated using SM (India) coal and Berau, C&A (Austria) coal. Experiments were performed in two different ways. In the first type of experiment, the temperature in the furnace was increased and the, samples were combusted at the ignition temperature after filling the furnace with coal. The second experimental method was to add the coal to after maintaining a constant temperature. The results demonstrated that SOx emission from coal combustion depended upon the sulfur content. In the case of Berau coal and C&A coal, an enhancement of combustibility which was accomplished by increasing the combustion temperature, an increase in airflow and decrease in particle size of coals tended to increase $SO_2$ generation. Conversely, in the case of SM coal, the concentration of $SO_2$ tended to decrease, because the high contents of $Fe_2O_3$ in the ashes increased the oxidation power of coal itself, which oxidized $SO_2$ into $SO_3$. In the case of C&A coal, the $SO_2$ peak was only observed twice. This was thought to be caused by the thermal transfer rate from the surface to the interior of the coal.

Keywords

coal;combustion;SOx;$Fe_2O_3$;sulfur;content

Acknowledgement

Supported by : 지식경제부

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